نتایج جستجو برای: the species diversity

تعداد نتایج: 16168662  

Hamid Ahani, Hamid Jalilvand

Forests are biologically diverse systems, representing some of the richest biological areas on Earth. They offer a variety of habitats for plants, animals and micro-organisms. However, forest biodiversity is increasingly threatened as a result of deforestation, fragmentation, climate change and other stressors. Biodiversity is the variation of life forms within a given ecosystem, biome, or on t...

Hamid Ahani, Hamid Jalilvand

Forests are biologically diverse systems, representing some of the richest biological areas on Earth. They offer a variety of habitats for plants, animals and micro-organisms. However, forest biodiversity is increasingly threatened as a result of deforestation, fragmentation, climate change and other stressors. Biodiversity is the variation of life forms within a given ecosystem, biome, or on t...

Journal: :iranian journal of fisheries science 0
s.m. kalantarian a. abdoli b.h. kiabi

the gobies are non-commercial fishes in the iranian waters of the caspian sea for which population dynamics and stock status are poorly known. in this survey, we tried to define species diversity and catch per unit effort (cpue) of gobiidae by using beach seine nets in salmanshahr, the southern caspian sea. from march 2011 to april 2012, 224 specimens representing 4 gobiid species, belonging to...

Hamid Ahani, Hamid Jalilvand

Forests are biologically diverse systems, representing some of the richest biological areas on Earth. They offer a variety of habitats for plants, animals and micro-organisms. However, forest biodiversity is increasingly threatened as a result of deforestation, fragmentation, climate change and other stressors. Biodiversity is the variation of life forms within a given ecosystem, biome, or on t...

Journal: :molecular biology research communications 0
muhammad irfan biotechnology research laboratory, shenyang academy of agricultural sciences, shenyang liaoning, china shuang yang biotechnology research laboratory, shenyang academy of agricultural sciences, shenyang liaoning, china luo yuxin biotechnology research laboratory, shenyang academy of agricultural sciences, shenyang liaoning, china jia-xing sun biotechnology research laboratory, shenyang academy of agricultural sciences, shenyang liaoning, china

this study investigated the genetic diversity of morchella species using randomly amplified polymorphic dna markers. morchella species are an important group of edible mushrooms belonging to the family helveliaceae with medicinal and economical significance. in this study we have developed an efficient method of genomic dna isolation which was amplified by eight rapd primers to test the polymor...

پایان نامه :0 1370

all analytical methods are generally based on the measurement of a parameter or parameters which are somehow related to the concentration of the species.an ideal analytical method is one in which the concentration of a species can be measured to a high degree precision and accuracy and with a high sensitivity. unfortunately finding such a method is very difficult or sometimes even impossible.in...

Journal: :journal of arthropod-borne diseases 0
teimour hazratian departmemt of parasitology, faculty of medicine, tabriz university of medical sciences, tabriz, iran hasan vatandoost department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran mohammad ali oshaghi department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran mohammad reza yaghoobi-ershadi department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran esmael fallah departmemt of parasitology, faculty of medicine, tabriz university of medical sciences, tabriz, iran sayena rafizadeh ministry of health and medical education, tehran, iran

background: there are nearly 1000 species of phlebotomine sand flies in 6 genera, of which only two, phlebotomus in the old world and lutzomyia in the new world are medically important. globally, leishmaniasis prevalent in 98 countries and affects estimated 12 million people with almost two million new cases per year. some rural areas of azarshahr district in east azarbaijan province have been ...

Abdoli, A., Kalantarian, S.M., Kiabi, B.H.,

The gobies are non-commercial fishes in the Iranian waters of the Caspian Sea for which population dynamics and stock status are poorly known. In this survey, we tried to define species diversity and catch per unit effort (CPUE) of Gobiidae by using beach seine nets in Salmanshahr, the southern Caspian Sea. From March 2011 to April 2012, 224 specimens representing 4 gobiid species, belonging to...

The aim of the study was to investigate affecting environmental factors on functional diversity indices and species diversity for the fluctuation of the management according to the ecological conditions in Raver rangeland. To determine the functional attributes of rangeland plants, 12 height points were selected along elevation gradient those were distance between them100 meters. 5 sampling plo...

حیدری, مهدی, عطارروشن, سینا,

This study aimed to investigate plant species diversity in the ecological species group in relation to the environmental factors. A study area of 216 ha in the southeast of Baghmalek on which seventy 20×20 m plots were established according to the random-systematic method was selected. Soil properties and physiographic factors were recorded at each plot. Herbaceous species composition was recor...

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